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Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
840 Shutdowns
When your 6890 GC encounters a Shutdown condition, a popup message
appears on the display. The popup message is numbered and contains a brief
description of the nature of the problem. This chapter provides more thorough
information about the problems that cause the GC or a component of the GC
to shut down.
The chapter presents the messages numerically according to the popup
message number.
Shutdown 1—Oven shut off
The amount of power required to keep the oven at setpoint exceeds the
expected power for that temperature. This error puts the 6890 GC in a not
ready state. The oven flaps open half way (if they are operating correctly).
You must turn the 6890 GC off and then on again or change the oven
temperature to restore operation.
The following may be causing the error:
❐ Check the oven flap on the back of the 6890 GC.
The oven flap should be open when cooling (for temperatures ranging
between 50 and 250°C) or closed completely to reach temperature
setpoints. If the oven flap is stuck open completely or partially, it is not
operating correctly.
❐ Check for a leak source in the oven (for example, missing insulation
around an inlet or detector location or a leak in the door).
❐ Check for excessive load in the oven (for example, a very large packed
column).
❐ The oven heater or the heater electronics are not operating correctly.
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